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load_pat.cpp
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load_pat.cpp
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/*
MikMod Sound System
By Jake Stine of Divine Entertainment (1996-2000)
Support:
If you find problems with this code, send mail to:
Distribution / Code rights:
Use this source code in any fashion you see fit. Giving me credit where
credit is due is optional, depending on your own levels of integrity and
honesty.
-----------------------------------------
Module: LOAD_PAT
PAT sample loader.
by Peter Grootswagers (2006)
<email:[email protected]>
It's primary purpose is loading samples for the .abc and .mid modules
Can also be used stand alone, in that case a tune (frere Jacques)
is generated using al samples available in the .pat file
Portability:
All systems - all compilers (hopefully)
*/
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <math.h>
#include <ctype.h>
#ifndef _WIN32
#include <limits.h> // for PATH_MAX
#include <unistd.h> // for sleep
#endif
#ifndef PATH_MAX
#define PATH_MAX 256
#endif
#ifdef NEWMIKMOD
#include "mikmod.h"
#include "uniform.h"
typedef UBYTE BYTE;
typedef UWORD WORD;
#else
#include "stdafx.h"
#include "sndfile.h"
#endif
#include "load_pat.h"
#ifdef _MSC_VER
#define DIRDELIM '\\'
#define TIMIDITYCFG "C:\\TIMIDITY\\TIMIDITY.CFG"
#define PATHFORPAT "C:\\TIMIDITY\\INSTRUMENTS"
#else
#define DIRDELIM '/'
#define TIMIDITYCFG "/usr/local/share/timidity/timidity.cfg"
#define PATHFORPAT "/usr/local/share/timidity/instruments"
#endif
#define PAT_ENV_PATH2CFG "MMPAT_PATH_TO_CFG"
// 128 gm and 63 drum
#define MAXSMP 191
static char midipat[MAXSMP][128];
static char pathforpat[128];
static char timiditycfg[128];
#ifdef _MSC_VER
#define isblank my_isblank
int isblank(int ch)
{
return ch==' ' || ch=='\t';
}
#endif
#pragma pack(1)
struct PatchHeader {
PatchHeader() { memset(this, 0, sizeof(*this)); }
char header[12]; // ascizz GF1PATCH110
char gravis_id[10]; // allways ID#000002
char description[60];
BYTE instruments;
BYTE voices;
BYTE channels;
WORD waveforms;
WORD master_volume;
DWORD data_size;
char reserved[36];
};
struct InstrumentHeader{
InstrumentHeader() { memset(this, 0, sizeof(*this)); }
WORD instrument_id;
char instrument_name[16];
DWORD instrument_size;
BYTE layers;
char reserved[40];
};
struct LayerHeader{
LayerHeader() { memset(this, 0, sizeof(*this)); }
BYTE layer_dup;
BYTE layer_id;
DWORD layer_size;
BYTE samples;
char reserved[40];
};
struct WaveHeader {
WaveHeader() { memset(this, 0, sizeof(*this)); }
char wave_name[7];
BYTE fractions;
DWORD wave_size;
DWORD start_loop;
DWORD end_loop;
WORD sample_rate;
DWORD low_frequency ;
DWORD high_frequency;
DWORD root_frequency;
short int tune;
BYTE balance;
BYTE envelope_rate[6];
BYTE envelope_offset[6];
BYTE tremolo_sweep;
BYTE tremolo_rate;
BYTE tremolo_depth;
BYTE vibrato_sweep;
BYTE vibrato_rate;
BYTE vibrato_depth;
BYTE modes;
DWORD scale_frequency;
DWORD scale_factor;
char reserved[32];
};
// WaveHeader.modes bits
#define PAT_16BIT 1
#define PAT_UNSIGNED 2
#define PAT_LOOP 4
#define PAT_PINGPONG 8
#define PAT_BACKWARD 16
#define PAT_SUSTAIN 32
#define PAT_ENVELOPE 64
#define PAT_CLAMPED 128
#define C4SPD 8363
#define C4mHz 523251
#define C4 523.251f
#define PI 3.141592653589793f
#define OMEGA ((2.0f * PI * C4)/(float)C4SPD)
/**************************************************************************
**************************************************************************/
#ifdef NEWMIKMOD
static char PAT_Version[] = "Timidity GUS Patch v1.0";
#endif
static BYTE pat_gm_used[MAXSMP];
static BYTE pat_loops[MAXSMP];
/**************************************************************************
**************************************************************************/
struct PATHANDLE
{
PATHANDLE() { memset(this, 0, sizeof(*this)); }
#ifdef NEWMIKMOD
MM_ALLOC *allochandle;
#endif
char patname[16];
int samples;
};
#ifndef HAVE_SINF
static inline float sinf(float x) {
/* default to double version */
return((float)sin((double)x));
}
#endif
// local prototypes
static int pat_getopt(const char *s, const char *o, int dflt);
static void pat_message(const char *s1, const char *s2)
{
char txt[256];
if( strlen(s1) + strlen(s2) > 255 ) return;
sprintf(txt, s1, s2);
#ifdef NEWMIKMOD
_mmlog(txt);
#else
fprintf(stderr, "load_pat > %s\n", txt);
#endif
}
void pat_resetsmp(void)
{
int i;
for( i=0; i<MAXSMP; i++ ) {
pat_loops[i] = 0;
pat_gm_used[i] = 0;
}
}
int pat_numsmp()
{
return strlen((const char *)pat_gm_used);
}
int pat_numinstr(void)
{
return strlen((const char *)pat_gm_used);
}
int pat_smptogm(int smp)
{
if( smp < MAXSMP )
return pat_gm_used[smp - 1];
return 1;
}
int pat_gmtosmp(int gm)
{
int smp;
for( smp=0; pat_gm_used[smp]; smp++ )
if( pat_gm_used[smp] == gm )
return smp+1;
if( smp < MAXSMP ) {
pat_gm_used[smp] = gm;
return smp+1;
}
return 1;
}
int pat_smplooped(int smp)
{
if( smp < MAXSMP ) return pat_loops[smp - 1];
return 1;
}
const char *pat_gm_name(int gm)
{
static char buf[40];
if( gm < 1 || gm > MAXSMP ) {
sprintf(buf, "invalid gm %d", gm);
return buf;
}
return midipat[gm - 1];
}
int pat_gm_drumnr(int n)
{
if( n < 25 ) return 129;
if( n+129-25 < MAXSMP )
return 129+n-25; // timidity.cfg drum patches start at 25
return MAXSMP;
}
int pat_gm_drumnote(int n)
{
char *p;
p = strchr(midipat[pat_gm_drumnr(n)-1], ':');
if( p ) return pat_getopt(p+1, "note", n);
return n;
}
static float pat_sinus(int i)
{
float res = sinf(OMEGA * (float)i);
return res;
}
static float pat_square(int i)
{
float res = 30.0f * sinf(OMEGA * (float)i);
if( res > 0.99f ) return 0.99f;
if( res < -0.99f ) return -0.99f;
return res;
}
static float pat_sawtooth(int i)
{
float res = OMEGA * (float)i;
while( res > 2 * PI )
res -= 2 * PI;
i = 2;
if( res > PI ) {
res = PI - res;
i = -2;
}
res = (float)i * res / PI;
if( res > 0.9f ) return 1.0f - res;
if( res < -0.9f ) return 1.0f + res;
return res;
}
typedef float (*PAT_SAMPLE_FUN)(int);
static PAT_SAMPLE_FUN pat_fun[] = { pat_sinus, pat_square, pat_sawtooth };
#ifdef NEWMIKMOD
#define MMFILE MMSTREAM
#define mmftell(x) _mm_ftell(x)
#define mmfseek(f,p,w) _mm_fseek(f,p,w)
#define mmreadUBYTES(buf,sz,f) _mm_read_UBYTES(buf,sz,f)
#else
#if defined(WIN32) && defined(_mm_free)
#undef _mm_free
#endif
#define MMSTREAM FILE
#define _mm_fopen(name,mode) fopen(name,mode)
#define _mm_fgets(f,buf,sz) fgets(buf,sz,f)
#define _mm_fseek(f,pos,whence) fseek(f,pos,whence)
#define _mm_ftell(f) ftell(f)
#define _mm_read_UBYTES(buf,sz,f) fread(buf,sz,1,f)
#define _mm_read_SBYTES(buf,sz,f) fread(buf,sz,1,f)
#define _mm_feof(f) feof(f)
#define _mm_fclose(f) fclose(f)
#define DupStr(h,buf,sz) strdup(buf)
#define _mm_calloc(h,n,sz) calloc(n,sz)
#define _mm_recalloc(h,buf,sz,elsz) realloc(buf,sz)
#define _mm_free(h,p) free(p)
typedef struct {
char *mm;
int sz;
int pos;
int error;
} MMFILE;
static long mmftell(MMFILE *mmfile)
{
return mmfile->pos;
}
static void mmfseek(MMFILE *mmfile, long p, int whence)
{
int newpos = mmfile->pos;
switch(whence) {
case SEEK_SET:
newpos = p;
break;
case SEEK_CUR:
newpos += p;
break;
case SEEK_END:
newpos = mmfile->sz + p;
break;
}
if (newpos < mmfile->sz)
mmfile->pos = newpos;
else {
mmfile->error = 1;
// printf("WARNING: seeking too far\n");
}
}
static void mmreadUBYTES(BYTE *buf, long sz, MMFILE *mmfile)
{
// do not overread.
if (sz > mmfile->sz - mmfile->pos)
sz = mmfile->sz - mmfile->pos;
memcpy(buf, &mmfile->mm[mmfile->pos], sz);
mmfile->pos += sz;
}
static void mmreadSBYTES(char *buf, long sz, MMFILE *mmfile)
{
// do not overread.
if (sz > mmfile->sz - mmfile->pos)
sz = mmfile->sz - mmfile->pos;
memcpy(buf, &mmfile->mm[mmfile->pos], sz);
mmfile->pos += sz;
}
#endif
long _mm_getfsize(MMSTREAM *mmpat) {
long fsize;
_mm_fseek(mmpat, 0L, SEEK_END);
fsize = _mm_ftell(mmpat);
_mm_fseek(mmpat, 0L, SEEK_SET);
return(fsize);
}
void pat_init_patnames(void)
{
int z, i, nsources, isdrumset, nskip, pfnlen;
char *p, *q;
char line[PATH_MAX];
char cfgsources[5][PATH_MAX] = {{0}, {0}, {0}, {0}, {0}};
MMSTREAM *mmcfg;
strcpy(pathforpat, PATHFORPAT);
strcpy(timiditycfg, TIMIDITYCFG);
#ifdef HX_WINRT
p = NULL;
#else
p = getenv(PAT_ENV_PATH2CFG);
#endif
if( p ) {
strcpy(timiditycfg,p);
strcpy(pathforpat,p);
strcat(timiditycfg,"/timidity.cfg");
strcat(pathforpat,"/instruments");
}
strncpy(cfgsources[0], timiditycfg, PATH_MAX);
nsources = 1;
for( i=0; i<MAXSMP; i++ ) midipat[i][0] = '\0';
for ( z=0; z<5; z++ ) {
if (cfgsources[z][0] == 0) continue;
mmcfg = _mm_fopen(cfgsources[z],"r");
if( !mmcfg ) {
pat_message("can not open %s, use environment variable " PAT_ENV_PATH2CFG " for the directory", cfgsources[z]);
}
else {
// read in bank 0 and drum patches
isdrumset = 0;
_mm_fgets(mmcfg, line, PATH_MAX);
while( !_mm_feof(mmcfg) ) {
if( isdigit(line[0]) || (isblank(line[0]) && isdigit(line[1])) ) {
p = line;
// get pat number
while ( isspace(*p) ) p ++;
i = atoi(p);
while ( isdigit(*p) ) p ++;
while ( isspace(*p) ) p ++;
// get pat file name
if( *p && i < MAXSMP && i >= 0 && *p != '#' ) {
q = isdrumset ? midipat[pat_gm_drumnr(i)-1] : midipat[i];
pfnlen = 0;
while( *p && !isspace(*p) && *p != '#' && pfnlen < 128 ) {
pfnlen ++;
*q++ = *p++;
}
if( isblank(*p) && *(p+1) != '#' && pfnlen < 128 ) {
*q++ = ':'; pfnlen ++;
while( isspace(*p) ) {
while( isspace(*p) ) p++;
if ( *p == '#' ) { // comment
} else while( *p && !isspace(*p) && pfnlen < 128 ) {
pfnlen ++;
*q++ = *p++;
}
if( isspace(*p) ) { *q++ = ' '; pfnlen++; }
}
}
*q++ = '\0';
}
}
if( !strncmp(line,"drumset",7) ) isdrumset = 1;
if( !strncmp(line,"source",6) && nsources < 5 ) {
q = cfgsources[nsources];
p = &line[7];
while ( isspace(*p) ) p ++;
pfnlen = 0;
while ( *p && *p != '#' && !isspace(*p) && pfnlen < 128 ) {
pfnlen ++;
*q++ = *p++;
}
*q = 0; // null termination
nsources++;
}
_mm_fgets(mmcfg, line, PATH_MAX);
} /* end file parsing */
_mm_fclose(mmcfg);
}
}
q = midipat[0];
nskip = 0;
// make all empty patches duplicates the previous valid one.
for( i=0; i<MAXSMP; i++ ) {
if( midipat[i][0] ) q = midipat[i];
else {
if( midipat[i] != q)
strcpy(midipat[i], q);
if( midipat[i][0] == '\0' ) nskip++;
}
}
if( nskip ) {
for( i=MAXSMP; i-- > 0; ) {
if( midipat[i][0] ) q = midipat[i];
else if( midipat[i] != q )
strcpy(midipat[i], q);
}
}
}
static char *pat_build_path(char *fname, int pat)
{
char *ps;
char *patfile = midipat[pat];
int isabspath = (patfile[0] == '/');
if ( isabspath ) patfile ++;
ps = strrchr(patfile, ':');
if( ps ) {
sprintf(fname, "%s%c%s", isabspath ? "" : pathforpat, DIRDELIM, patfile);
strcpy(strrchr(fname, ':'), ".pat");
return ps;
}
sprintf(fname, "%s%c%s.pat", isabspath ? "" : pathforpat, DIRDELIM, patfile);
return 0;
}
static void pat_read_patname(PATHANDLE *h, MMFILE *mmpat) {
InstrumentHeader ih;
mmfseek(mmpat,sizeof(PatchHeader), SEEK_SET);
mmreadUBYTES((BYTE *)&ih, sizeof(InstrumentHeader), mmpat);
strncpy(h->patname, ih.instrument_name, 16);
h->patname[15] = '\0';
}
static void pat_read_layerheader(MMSTREAM *mmpat, LayerHeader *hl)
{
_mm_fseek(mmpat,sizeof(PatchHeader)+sizeof(InstrumentHeader), SEEK_SET);
_mm_read_UBYTES((BYTE *)hl, sizeof(LayerHeader), mmpat);
}
static void pat_get_layerheader(MMFILE *mmpat, LayerHeader *hl)
{
InstrumentHeader ih;
mmfseek(mmpat,sizeof(PatchHeader), SEEK_SET);
mmreadUBYTES((BYTE *)&ih, sizeof(InstrumentHeader), mmpat);
mmreadUBYTES((BYTE *)hl, sizeof(LayerHeader), mmpat);
strncpy(hl->reserved, ih.instrument_name, 40);
}
static int pat_read_numsmp(MMFILE *mmpat) {
LayerHeader hl;
pat_get_layerheader(mmpat, &hl);
return hl.samples;
}
static void pat_read_waveheader(MMSTREAM *mmpat, WaveHeader *hw, int layer)
{
long int pos, bestpos=0;
LayerHeader hl;
ULONG bestfreq, freqdist;
int i;
// read the very first and maybe only sample
pat_read_layerheader(mmpat, &hl);
if( hl.samples > 1 ) {
if( layer ) {
if( layer > hl.samples ) layer = hl.samples; // you don't fool me....
for( i=1; i<layer; i++ ) {
_mm_read_UBYTES((BYTE *)hw, sizeof(WaveHeader), mmpat);
_mm_fseek(mmpat, hw->wave_size, SEEK_CUR);
}
}
else {
bestfreq = C4mHz * 1000; // big enough
for( i=0; i<hl.samples; i++ ) {
pos = _mm_ftell(mmpat);
_mm_read_UBYTES((BYTE *)hw, sizeof(WaveHeader), mmpat);
if( hw->root_frequency > C4mHz )
freqdist = hw->root_frequency - C4mHz;
else
freqdist = 2 * (C4mHz - hw->root_frequency);
if( freqdist < bestfreq ) {
bestfreq = freqdist;
bestpos = pos;
}
_mm_fseek(mmpat, hw->wave_size, SEEK_CUR);
}
_mm_fseek(mmpat, bestpos, SEEK_SET);
}
}
_mm_read_UBYTES((BYTE *)hw, sizeof(WaveHeader), mmpat);
strncpy(hw->reserved, hl.reserved, 36);
if( hw->start_loop >= hw->wave_size ) {
hw->start_loop = 0;
hw->end_loop = 0;
hw->modes &= ~PAT_LOOP; // mask off loop indicator
}
if( hw->end_loop > hw->wave_size )
hw->end_loop = hw->wave_size;
}
#ifndef NEWMIKMOD
static void pat_get_waveheader(MMFILE *mmpat, WaveHeader *hw, int layer)
{
long int pos, bestpos=0;
LayerHeader hl;
ULONG bestfreq, freqdist;
int i;
// read the very first and maybe only sample
pat_get_layerheader(mmpat, &hl);
if( hl.samples > 1 ) {
if( layer ) {
if( layer > hl.samples ) layer = hl.samples; // you don't fool me....
for( i=1; i<layer; i++ ) {
mmreadUBYTES((BYTE *)hw, sizeof(WaveHeader), mmpat);
mmfseek(mmpat, hw->wave_size, SEEK_CUR);
if ( mmpat->error ) {
hw->wave_size = 0;
return;
}
}
}
else {
bestfreq = C4mHz * 1000; // big enough
for( i=0; i<hl.samples; i++ ) {
pos = mmftell(mmpat);
mmreadUBYTES((BYTE *)hw, sizeof(WaveHeader), mmpat);
if( hw->root_frequency > C4mHz )
freqdist = hw->root_frequency - C4mHz;
else
freqdist = 2 * (C4mHz - hw->root_frequency);
if( freqdist < bestfreq ) {
bestfreq = freqdist;
bestpos = pos;
}
mmfseek(mmpat, hw->wave_size, SEEK_CUR);
}
mmfseek(mmpat, bestpos, SEEK_SET);
}
}
mmreadUBYTES((BYTE *)hw, sizeof(WaveHeader), mmpat);
if( hw->start_loop >= hw->wave_size ) {
hw->start_loop = 0;
hw->end_loop = 0;
hw->modes &= ~PAT_LOOP; // mask off loop indicator
}
if( hw->end_loop > hw->wave_size )
hw->end_loop = hw->wave_size;
}
#endif
static int pat_readpat_attr(int pat, WaveHeader *hw, int layer)
{
char fname[128];
int fsize;
MMSTREAM *mmpat;
pat_build_path(fname, pat);
mmpat = _mm_fopen(fname, "r");
if( !mmpat )
return 0;
fsize = _mm_getfsize(mmpat);
pat_read_waveheader(mmpat, hw, layer);
_mm_fclose(mmpat);
if (hw->wave_size > fsize)
return 0;
return 1;
}
static void pat_amplify(char *b, int num, int amp, int m)
{
char *pb;
BYTE *pu;
short int *pi;
WORD *pw;
int i,n,v;
n = num;
if( m & PAT_16BIT ) { // 16 bit
n >>= 1;
if( m & 2 ) { // unsigned
pw = (WORD *)b;
for( i=0; i<n; i++ ) {
v = (((int)(*pw) - 0x8000) * amp) / 100;
if( v < -0x8000 ) v = -0x8000;
if( v > 0x7fff ) v = 0x7fff;
*pw++ = v + 0x8000;
}
}
else {
pi = (short int *)b;
for( i=0; i<n; i++ ) {
v = ((*pi) * amp) / 100;
if( v < -0x8000 ) v = -0x8000;
if( v > 0x7fff ) v = 0x7fff;
*pi++ = v;
}
}
}
else {
if( m & 2 ) { // unsigned
pu = (BYTE *)b;
for( i=0; i<n; i++ ) {
v = (((int)(*pu) - 0x80) * amp) / 100;
if( v < -0x80 ) v = -0x80;
if( v > 0x7f ) v = 0x7f;
*pu++ = v + 0x80;
}
}
else {
pb = (char *)b;
for( i=0; i<n; i++ ) {
v = ((*pb) * amp) / 100;
if( v < -0x80 ) v = -0x80;
if( v > 0x7f ) v = 0x7f;
*pb++ = v;
}
}
}
}
static int pat_getopt(const char *s, const char *o, int dflt)
{
const char *p;
if( !s ) return dflt;
p = strstr(s,o);
if( !p ) return dflt;
return atoi(strchr(p,'=')+1);
}
static void pat_readpat(int pat, char *dest, int num)
{
static int readlasttime = 0, wavesize = 0;
static MMSTREAM *mmpat = 0;
static char *opt = 0;
int amp;
char fname[128];
WaveHeader hw;
#ifdef NEWMIKMOD
static int patlast = MAXSMP;
if( !dest ) { // reset
if( mmpat ) _mm_fclose(mmpat);
readlasttime = 0;
wavesize = 0;
mmpat = 0;
patlast = MAXSMP;
return;
}
if( pat != patlast ) { // reset for other instrument
if( mmpat ) _mm_fclose(mmpat);
readlasttime = 0;
patlast = pat;
}
#endif
if( !readlasttime ) {
opt=pat_build_path(fname, pat);
mmpat = _mm_fopen(fname, "r");
if( !mmpat )
return;
pat_read_waveheader(mmpat, &hw, 0);
wavesize = hw.wave_size;
}
_mm_read_SBYTES(dest, num, mmpat);
amp = pat_getopt(opt,"amp",100);
if( amp != 100 ) pat_amplify(dest, num, amp, hw.modes);
readlasttime += num;
if( readlasttime < wavesize ) return;
readlasttime = 0;
_mm_fclose(mmpat);
mmpat = 0;
}
#ifdef NEWMIKMOD
// next code pinched from dec_raw.c and rebuild to load bytes from different places
// =====================================================================================
static void *dec_pat_Init(MMSTREAM *mmfp)
{
pat_readpat(0,0,0); // initialize pat loader
return (void *)mmfp;
}
static void dec_pat_Cleanup(void *raw)
{
}
static BOOL dec_pat_Decompress16Bit(void *raw, short int *dest, int cbcount, MMSTREAM *mmfp)
{
long samplenum = _mm_ftell(mmfp) - 1;
#else
static BOOL dec_pat_Decompress16Bit(short int *dest, int cbcount, int samplenum)
{
#endif
int i;
PAT_SAMPLE_FUN f;
if( samplenum < MAXSMP ) pat_readpat(samplenum, (char *)dest, cbcount*2);
else {
f = pat_fun[(samplenum - MAXSMP) % 3];
for( i=0; i<cbcount; i++ )
dest[i] = (short int)(32000.0*f(i));
}
return cbcount;
}
// convert 8 bit data to 16 bit!
// We do the conversion in reverse so that the data we're converting isn't overwritten
// by the result.
static void pat_blowup_to16bit(short int *dest, int cbcount) {
char *s;
short int *d;
int t;
s = (char *)dest;
d = dest;
s += cbcount;
d += cbcount;
for(t=0; t<cbcount; t++)
{ s--;
d--;
*d = (*s) << 8;
}
}
#ifdef NEWMIKMOD
static BOOL dec_pat_Decompress8Bit(void *raw, short int *dest, int cbcount, MMSTREAM *mmfp)
{
long samplenum = _mm_ftell(mmfp) - 1;
#else
static BOOL dec_pat_Decompress8Bit(short int *dest, int cbcount, int samplenum)
{
#endif
int i;
PAT_SAMPLE_FUN f;
if( samplenum < MAXSMP ) pat_readpat(samplenum, (char *)dest, cbcount);
else {
f = pat_fun[(samplenum - MAXSMP) % 3];
for( i=0; i<cbcount; i++ )
dest[i] = (char)(120.0*f(i));
}
pat_blowup_to16bit(dest, cbcount);
return cbcount;
}
#ifdef NEWMIKMOD
SL_DECOMPRESS_API dec_pat =
{
NULL,
SL_COMPRESS_RAW,
dec_pat_Init,
dec_pat_Cleanup,
dec_pat_Decompress16Bit,
dec_pat_Decompress8Bit,
};
#endif
// =====================================================================================
#ifdef NEWMIKMOD
BOOL PAT_Test(MMSTREAM *mmfile)
#else
BOOL CSoundFile::TestPAT(const BYTE *lpStream, DWORD dwMemLength)
#endif
// =====================================================================================
{
PatchHeader ph;
#ifdef NEWMIKMOD
_mm_fseek(mmfile,0,SEEK_SET);
_mm_read_UBYTES((BYTE *)&ph, sizeof(PatchHeader), mmfile);
#else
if( dwMemLength < sizeof(PatchHeader) ) return 0;
memcpy((BYTE *)&ph, lpStream, sizeof(PatchHeader));
#endif
if( !strcmp(ph.header,"GF1PATCH110") && !strcmp(ph.gravis_id,"ID#000002") ) return 1;
return 0;
}
// =====================================================================================
static PATHANDLE *PAT_Init(void)
{
PATHANDLE *retval;
#ifdef NEWMIKMOD
MM_ALLOC *allochandle;
allochandle = _mmalloc_create("Load_PAT", NULL);
retval = (PATHANDLE *)_mm_calloc(allochandle, 1,sizeof(PATHANDLE));
if( !retval ) return NULL;
SL_RegisterDecompressor(&dec_raw); // we can not get the samples out of our own routines...!
#else
retval = (PATHANDLE *)calloc(1,sizeof(PATHANDLE));
if( !retval ) return NULL;
#endif
return retval;
}
// =====================================================================================
static void PAT_Cleanup(PATHANDLE *handle)
// =====================================================================================
{
#ifdef NEWMIKMOD
if(handle && handle->allochandle) {
_mmalloc_close(handle->allochandle);
handle->allochandle = 0;
}
#else
if(handle) {
free(handle);
}
#endif
}
static char tune[] = "c d e c|c d e c|e f g..|e f g..|gagfe c|gagfe c|c G c..|c G c..|";
static int pat_note(int abc)
{
switch( abc ) {
case 'C': return 48;
case 'D': return 50;
case 'E': return 52;
case 'F': return 53;
case 'G': return 55;
case 'A': return 57;
case 'B': return 59;
case 'c': return 60;
case 'd': return 62;
case 'e': return 64;
case 'f': return 65;
case 'g': return 67;
case 'a': return 69;
case 'b': return 71;
default:
break;
}
return 0;
}
int pat_modnote(int midinote)
{
int n;
n = midinote;
#ifdef NEWMIKMOD
if( n < 12 ) n++;
else n-=11;
#else
n += 13;
#endif
return n;
}
// =====================================================================================
#ifdef NEWMIKMOD
static void PAT_ReadPatterns(UNIMOD *of, PATHANDLE *h, int numpat)
// =====================================================================================
{
int pat,row,i,ch;
BYTE n,ins,vol;
int t;
int tt1, tt2;
UNITRK_EFFECT eff;
tt2 = (h->samples - 1) * 16 + 128;
for( pat = 0; pat < numpat; pat++ ) {
utrk_reset(of->ut);
for( row = 0; row < 64; row++ ) {
tt1 = (pat * 64 + row);
for( ch = 0; ch < h->samples; ch++ ) {
t = tt1 - ch * 16;
if( t >= 0 ) {
i = tt2 - 16 * ((h->samples - 1 - ch) & 3);
if( tt1 < i ) {
t = t % 64;
if( isalpha(tune[t]) ) {
utrk_settrack(of->ut, ch);
n = pat_modnote(pat_note(tune[t]));
ins = ch;
vol = 100;
if( (t % 16) == 0 ) {
vol += vol / 10;
if( vol > 127 ) vol = 127;
}
utrk_write_inst(of->ut, ins);
utrk_write_note(of->ut, n); // <- normal note
pt_write_effect(of->ut, 0xc, vol);
}
if( tt1 == i - 1 && ch == 0 && row < 63 ) {
eff.effect = UNI_GLOB_PATBREAK;
eff.param.u = 0;
eff.framedly = UFD_RUNONCE;
utrk_write_global(of->ut, &eff, UNIMEM_NONE);
}
}
else {
if( tt1 == i ) {
eff.param.u = 0;
eff.effect = UNI_NOTEKILL;
utrk_write_local(of->ut, &eff, UNIMEM_NONE);
}
}
}
}
utrk_newline(of->ut);
}
if(!utrk_dup_pattern(of->ut,of)) return;
}
}
#else
static void PAT_ReadPatterns(MODCOMMAND *pattern[], WORD psize[], PATHANDLE *h, int numpat)
// =====================================================================================
{
int pat,row,i,ch;
BYTE n,ins,vol;
int t;
int tt1, tt2;